University of Jyväskylä

Dissertation: 13. May 2015: Hitting two birds with one stone. Solutions for boiler operation issues with ash chemistry

Start date: May 13, 2015 12:00 PM

End date: May 13, 2015 03:00 PM

Location: Ylistönrinne, KEM1

Cyril BajamundiMSc Cyril Bajamundi defends his doctoral dissertation in Applied Chemistry "Sulfur based abatement of PCDD/F production and alkali chloride production during fluidized bed combustion of solid recovered fuel". Opponent Dosent Lars-Erik Amandia (Chalmers University of Technology) and custos Professor Rai­mo Alen (University of Jyväskylä).

Energy recovery from waste is one viable option for ensuring efficient waste management. It can reduce landfill waste by up to 20 fold by volume leaving only sterile residues. However, there are several issues that are against the realization of this potential. Waste-to-energy facilities are considered by some as “dioxin factories”, and Cl in the waste could cause significant profit loss due to corrosion.

This work presents the production and abatement of polychlorinated dibenzo-p-dioxins/ dibenzofuran (PCDD/F), and alkali chloride production in a 140 MWth bubbling fluidized boiler fired with fuel mixtures containing a high energy-share of solid recovered fuel. Sulfur based additives induce sulfation of Cu and alkali salt. These additives can readily be applied in similar fluidized bed combustion and can therefore be a practicable solution to the issues discussed.

The dissertation is published in VTT Science, 85. ISBN 978-951-38-8244-0 (Soft back ed.), ISBN 978-951-38-8245-7 (URL:, ISSN-L 2242-119X. It is also available at the Department of Chemistry, University of Jyväskylä, and tel. no. +358 40 024 7976.

Contact Details: Cyril Bajamundi,, tel. +358 40 512 2673

MSc. Bajamundi is from Bulan, Philippines with a BSc. and MSc. Chemical Engineering from the University of the Philippines (Diliman Campus). Before coming to Finland he was a faculty member of the UP Chemical Engineering Department. In Sept. 2011 he moved to Finland to work as Research Scientist at VTT Technical Research Centre of Finland.

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Bajamundi Cyril